Power-hammer.



10.726,87'9. y PATENTED MAY5,1903.

Gl El POWER HAMMER.

APPLIOATION FILED 0014, 1902. Y no MODEL. mums-sanar. L afa.

@v1/vanto@ Bg i No. 726,879. PATENTED MAY 5, 1901i.

G. E@ DAVIS'. POWER HAMMER.

APPLICATION FILED 0UT.4, 1902.

No MODEL. i asumir-SHEET 2.-

La4 rum.,-

Patented May 5, 1903.

` ATENT Fries.V

I GEORGE E. DAVIS, OF DUBUQUE, IOWA.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 726,879, dated May 5, 1903.

' limitation nea 06mm, 1902.

To all whom 1f/ 771/aty concern:

Beit knowngthatLGEonGE E.l DAv1s,a citizen of the UnitedStates, resid-ing at Dubuque, in the county OfDubuqueand State of Iowa, have invented certangnewgand useful Improvements in PowerfHam-mersof which the following is a speciticationprf This invention relates-to improvements iu power-hammers; and themain object of my invention is the provision of a1 novel construction of a power-'hammerfwhich is so constructed as to be readily taken-apart or assembled, thus producinga machine which is readily transported in ;knoc kdo wn shape, and thus overcoming theobjections to powerhammers in generalfpse. 1 Y

To attain these objects, thieuinvention consists of a powerhammer embodying novel features of construction'and combination of parts, substantially as disclosed herein.

In the accompanying drawings, Figure l is a perspective view of the entire power-hammer assembled readyfor use Fig, 2 is an enlarged'side elevation of the upper'portion thereof. Fig. 3' is a detail sideelevation of the hammerlandconnecting-rod. Fig. 4 is a detail perspective view ot thebase'and suppOrDgrStlldaldS .Wihlhe hammenand anvil removed. Fig. 5 is a sectional view taken through the hammer-guiding yoke and, a portion of the standards. Fig. 6 ishaperspective View of the base detached. Fig. 7 is a sectional View through the base and the lower ends of the rear tubular standards. Fig. 3 is a sectional view through the forward por-I tion of the forward standards. Fig.` 9 isa?, sectional view through the baseplate jandf one of the tubular standards to show the con` nection therebetween; and Fig. 10 is an enlarged detail View of the plate 3, showing the bearings for the frame 19.

Referring to the drawings, the numeral l designates the base of the machine proper, which i sprovided with four projections or bosses l?, surrounding which are mounted and secured, by means of bolts, the four tubular standards 2 which have their-upper ends surrounding L similar projections' or bossesf2upon the under side of plate 3, said platebeing secured upon the standards by means of the long bolts 3, extending through the same, the base, and tubular standards,

Serial No. 125,975. (No modeLIl and fastened with-nuts 4. Formed integral with the base, near the rear portion thereof and projecting upward therefrom, are the alined eyed lugsY 5, in which is pivotally mounted the bail4 or foot-lever 6, which is adapted to surround the base of the anvil 7. The purpose of this lever is to'operate the combined tightnerf and brake-lever (hereinafter described) bymeans of the hooked rod 8, having its lowerend connected to said bail and its upper hooked end engaging the eyed ends 9 of said combined tightener and brakelever.

Upon the top of the ,forward end of the base 1 I place the anvil 7, which is provided in its top with a lateralv groove 10, in which is movably mounted-the hard contact-block 1l.

Formed integral and extending upward from the plate 3 are the two standards 12, which with the upper castings 13 form journals or bearings for theshaft14, upon which is mounted a pulley 15, which receives motion from the belt 16. Pivotally secured to the plate 3 by meansoffbexcapslof and the depressions 18 beneath thesame andfinclined outwardly is a substantiallyUshaped frame 19, which is provided with.v the inclined rectangular opening 20, in which .isadjustably secured the rectangular rod Olbearing 21, having a b ifurcated upper end-22, in which is journaledatension-pulley 23.

The top plate'3 is provided with depressions 1 8 forreceiving the trlinnimshflb of the frame 19, these depressions being upon the opposite side from the depressionslS in same, Figs.- 1 and 4C, in order that thje frame 19 may befreversedto admit of runningfthe belt in the opposite direction when it iszdesired to place the machine in a Vnecessary position relative to the location of the line-shaft from which the machine is driven. "T. his reversible feature is vn 0 vel and valuable and possessed by no other tripfham'mer. i

In order to keep the belt at the proper tension, the ,pulley 23 is pressed intol contact With the. belt- '16 fbvpressing; dewntvarduthe bail6,"connected with the hooked rod8,'which in turn depresses the c ombined`1tighten`er and brake-lever 19, where connected at its eyed end 9. Upon the lower end of the U-shaped frame 19 is attached a friction-block 24:,which engages with the widened flanges of the pul- ICO -ley 15, acting as a brake upon the same by means of the tension of the coiled spring 25, which is attached at one end of the inclined terminus of the U-shaped lever 19 and at the other end of the adjustable hooked bolt 26, which in turn extends through the bar 27, supported upon the inverted pedestal 2S, which depends from the under side of the plate 3 and is fastened thereto by the bolt 29.

Carried upon the outer end of the shaft 14 is a disk 30, in which is provided a slot 31, in which is adjustably fastened a pitman 32. In order to determine the length of stroke of the hammer, the pitman is fastened in the groove at a greater or less distance at either side from the center of the disk by the nut 33, attached to the bolt 34, extending through wristpin 35, upon which the pitman is pivoted. This pitman is tubular and has slidingly mounted therein a telescoping rod or connecting-link 36, which has its lower end connected to a clamp 37, which surrounds the substantially U-shaped spring 38 at its center. The lower ends 39 of this leaf-spring are curved outwardly and are forced outward by means of the spring tension, thus holding the pivoted links 40 in oppositely-spread positions, so as to render elasticity to the hammer-head 41, which is provided in its lower end with a slot, in which is removably fitted the hammer-die 41', which is generally of a harder material than the head, and thus produces a hammer which when broken or mashed can be readily removed This hammerhead is provided with two opposed vertical slots 43, which are adapted to slidingly engage the removable guide-plates 44, secured in the forward end upon the outer face of the yoke 45 by means of bolts 46. This yoke comprises substantially the two outwardly-inclined arms 47, whose ends 48 are provided with the curved faces 49 and the openings 50 to receive the bolts 5l and allow the clamp-plates 52, which are provided with similar opposed curved faces 53, to engage the two forward tubular supports or standards, thus holding the yoke at the desired adjustment.

From this description, taken in connection with the drawings, it is evident that I provide a power-hammer which is readily taken apart and made ready for transportation, and which after being received in the knockdown form is very easily and readily assembled for operative position.

My power-hammer is operated and controlled as follows: The belt 16 runs loosely over the pulley 15, and when it is desired to set the hammer in motion the foot-lever or bail 6 is depressed, which rocks or tilts upon its trunnions the frame 19, thus releasing the break-block 24 from the pulley l5 and at the same time forcing the tightener-pulley 23 against the belt 16, which in turn grips the pulley l5, thus rotating its shaft 14, thereby transmitting a reciprocating motion to the hammer-head by means of its links, leafspring, pitman, and crank-disk, as hereinbefore described. W'hen the foot lever is pressed lightly, the belt slips over the pulley at slight tension, which revolves the same more slowly, (on account of slippage,) thus lessening the force of blow and speed of the hammerhead,.and when the pressure is entirely removed from the foot-lever the tightener-pulley 23 becomes disengaged from the belt,while at the same time the tension-spring 25 brings the brake-block 24 into contact with the widened flanges of the pulley l5, instantly stopping the motion of the same.

By constructing the base, the plate 3, and the tubular standards separate the long bolts 3 can be readily secured in place to assemble these three main parts, but may be readily removed to allow the entire construction to be knocked down, the adjustably-mounted hammer-guiding yoke being removably secured to the forward standards, so that the same is readily removed from connection with the tubular standards, thus allowing the machine to be separated in as many parts as is desired for transportation.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a power-hammer, the combination of a base, four vertical standards detachably secured to and projecting upward therefrom, a yoke adjustably secured to the two forward standards and projecting outward from said standards, guides carried by the outer end of said yoke, a reciprocating hammer mounted in the guides of said yoke, a leaf-spring connected to the hammer, a supportingplate detachably secured upon the upper ends of said standards, and a mechanism mounted upon said plate and connected with the leafspring for reciprocating the hammer.

2. In a hammer, the combination of a base, an anvil, a series of four standards having their lower ends detachably secured to the base and projecting upward therefrom ,a yoke adjustable vertically on the forward pair of said standards, guides carried by its outer face above and to each side of the apex of the anvil, a hammer reciprocatingly mounted in said guides, oppositely-arranged and pivotally-mounted links carried by the hammer, a substantially U-shaped leaf-spring having its terminal connected to said links, a telescoping pitman connected to the upper central portion of the spring, a plate detachably secured to the upper end of said standards supported thereby, and mechanism mounted upon said supporting-plate for operating the pitman to convey a reciprocating motion to the hammer.

3. In a power-hammer, the combination of a base, an anvil, a series of four standards having their lower ends adjustably secured at right angles to each other to the base, a yoke adjustable vertically on the forward pair of said standards, guides removably secured to the outer face of said yoke, a hammer reciprocatingly mounted between said guides, oppositely-arranged and pivotally-mounted ICC tachably said scoping pitman slidingly mounted in said groove, and a powertransmitting means mounted upon the shaft.

4. In a power-hammer, the combination of a base provided with four upwardly-projecting bosses, aseries of four cylindrical standards having theirlower ends surrounding said bosses and removably secured to the base, an upon said forward projection rectangular plate detachably secured to the upper ends of said standards a yoke provided with inclined arms having curved faces upon their extreme ends to contact the forward pair of said standards,clamp plates adapted to be secured to the rear face J. H. ELLWANGER, J. F. NELSON. 

